What are 2-, 3- and 4-wire circuits?
They describe the number of wires with which the measuring resistor (e.g. a Pt100) is connected. While with the simplest 2-wire connection, the lead resistance can falsify the measuring result, this negative influence can be compensated within the 3- ...
moreWhat is the value of the current at the output limits in accordance with NAMUR?
Lower output limit in accordance with NAMUR is 3.8 mA (other value possible)
Upper output limit in accordance with NAMUR is 20.5 mA (other value possible)